XML 119 R85.htm IDEA: XBRL DOCUMENT v3.22.0.1
Debt - Receivables Securitization Agreement (Details) - UScellular - Receivables securitization agreement
$ in Millions
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]  
Amounts borrowed $ 450
Maximum borrowing capacity 450
Assets available to be pledged $ 638